How to unbind Shift-Alt Up shortkey in 12.04?

How to unbind Shift + Alt + Up shortkey in Ubuntu 12.04? I can't find it in system's Keyboard shortcuts settings. I want to unbind this shortcut so I can use it in an application.

It should be in > System Settings > Keyboard > Shortcuts (but I can't seem to find it there)

Solution

Install Compiz Config Settings. To install if I remember it's

sudo apt-get install compizconfig-settings-manager

Once installed:

• Go to -> Compiz Settings > Scale > Bindings > Initiate Window Picker
• Mouse Click > <Shift><Alt><Up> (a popup opens) > uncheck "Enabled"
• Done

Bug Report: Scale: keyboard binding for "Initiate Window Picker For window Group" is non-functional

Resources

Alt-Shift-Up in the NetBeans Java Editor on Ubuntu